package com.yupi.yupicturebackend.utils;

import cn.hutool.core.date.DateUtil;
import cn.hutool.core.util.IdUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.yupi.yupicturebackend.model.dto.workflow.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collectors;

/**
 * 图片协作和工作流工具类
 * 
 * <p>提供团队协作看板、审批流程、版本控制、任务分配等企业级协作功能</p>
 * 
 * @author yupi
 */
@Slf4j
@Component
public class CollaborationWorkflowUtils {

    /**
     * 创建协作项目
     *
     * @param projectConfig 项目配置
     * @return 项目创建结果
     */
    public static ProjectCreationResult createCollaborationProject(CollaborationProjectConfig projectConfig) {
        try {
            log.info("创建协作项目: {}", projectConfig.getProjectName());
            
            // 1. 创建项目基础信息
            CollaborationProject project = new CollaborationProject();
            project.setProjectId(IdUtil.fastSimpleUUID());
            project.setProjectName(projectConfig.getProjectName());
            project.setDescription(projectConfig.getDescription());
            project.setOwner(projectConfig.getOwner());
            project.setCreateTime(LocalDateTime.now());
            project.setStatus("active");
            project.setVisibility(projectConfig.getVisibility());
            
            // 2. 初始化团队成员
            List<TeamMember> teamMembers = initializeTeamMembers(projectConfig.getTeamMembers());
            project.setTeamMembers(teamMembers);
            
            // 3. 创建默认工作流
            List<WorkflowTemplate> workflows = createDefaultWorkflows(project.getProjectId(), projectConfig);
            
            // 4. 初始化看板
            KanbanBoard kanbanBoard = initializeKanbanBoard(project.getProjectId(), projectConfig);
            
            // 5. 设置权限和角色
            ProjectPermissions permissions = setupProjectPermissions(teamMembers, projectConfig);
            
            ProjectCreationResult result = new ProjectCreationResult();
            result.setSuccess(true);
            result.setProject(project);
            result.setWorkflows(workflows);
            result.setKanbanBoard(kanbanBoard);
            result.setPermissions(permissions);
            result.setInvitationLinks(generateInvitationLinks(project.getProjectId(), teamMembers));
            
            return result;
            
        } catch (Exception e) {
            log.error("创建协作项目失败: {}", projectConfig.getProjectName(), e);
            return createProjectCreationErrorResult("创建失败: " + e.getMessage());
        }
    }

    /**
     * 创建审批工作流
     *
     * @param workflowConfig 工作流配置
     * @return 工作流创建结果
     */
    public static WorkflowCreationResult createApprovalWorkflow(ApprovalWorkflowConfig workflowConfig) {
        try {
            log.info("创建审批工作流: {}", workflowConfig.getWorkflowName());
            
            // 1. 创建工作流基础信息
            ApprovalWorkflow workflow = new ApprovalWorkflow();
            workflow.setWorkflowId(IdUtil.fastSimpleUUID());
            workflow.setWorkflowName(workflowConfig.getWorkflowName());
            workflow.setDescription(workflowConfig.getDescription());
            workflow.setProjectId(workflowConfig.getProjectId());
            workflow.setCreateTime(LocalDateTime.now());
            workflow.setStatus("active");
            
            // 2. 构建审批节点
            List<ApprovalNode> approvalNodes = buildApprovalNodes(workflowConfig.getApprovalSteps());
            workflow.setApprovalNodes(approvalNodes);
            
            // 3. 设置触发条件
            List<WorkflowTrigger> triggers = setupWorkflowTriggers(workflowConfig.getTriggerConditions());
            workflow.setTriggers(triggers);
            
            // 4. 配置通知规则
            List<NotificationRule> notificationRules = setupNotificationRules(workflowConfig.getNotificationSettings());
            workflow.setNotificationRules(notificationRules);
            
            // 5. 设置SLA规则
            SLAConfiguration slaConfig = setupSLAConfiguration(workflowConfig.getSlaSettings());
            workflow.setSlaConfiguration(slaConfig);
            
            WorkflowCreationResult result = new WorkflowCreationResult();
            result.setSuccess(true);
            result.setWorkflow(workflow);
            result.setWorkflowDiagram(generateWorkflowDiagram(workflow));
            result.setEstimatedProcessingTime(calculateEstimatedProcessingTime(approvalNodes));
            
            return result;
            
        } catch (Exception e) {
            log.error("创建审批工作流失败: {}", workflowConfig.getWorkflowName(), e);
            return createWorkflowCreationErrorResult("创建失败: " + e.getMessage());
        }
    }

    /**
     * 版本控制管理
     *
     * @param imageUrl 图片URL
     * @param versionConfig 版本配置
     * @return 版本控制结果
     */
    public static VersionControlResult manageImageVersion(String imageUrl, ImageVersionConfig versionConfig) {
        try {
            log.info("管理图片版本: {}", imageUrl);
            
            // 1. 创建新版本
            ImageVersion newVersion = new ImageVersion();
            newVersion.setVersionId(IdUtil.fastSimpleUUID());
            newVersion.setImageUrl(imageUrl);
            newVersion.setVersionNumber(versionConfig.getVersionNumber());
            newVersion.setVersionName(versionConfig.getVersionName());
            newVersion.setAuthor(versionConfig.getAuthor());
            newVersion.setCreateTime(LocalDateTime.now());
            newVersion.setChangeDescription(versionConfig.getChangeDescription());
            newVersion.setTags(versionConfig.getTags());
            
            // 2. 计算版本差异
            List<VersionDifference> differences = calculateVersionDifferences(imageUrl, versionConfig.getPreviousVersionUrl());
            
            // 3. 创建版本分支（如果需要）
            VersionBranch branch = null;
            if (versionConfig.isCreateBranch()) {
                branch = createVersionBranch(newVersion, versionConfig.getBranchName());
            }
            
            // 4. 更新版本历史
            VersionHistory versionHistory = updateVersionHistory(newVersion, versionConfig.getProjectId());
            
            // 5. 权限检查和设置
            VersionPermissions permissions = setupVersionPermissions(newVersion, versionConfig);
            
            VersionControlResult result = new VersionControlResult();
            result.setSuccess(true);
            result.setNewVersion(newVersion);
            result.setVersionDifferences(differences);
            result.setVersionBranch(branch);
            result.setVersionHistory(versionHistory);
            result.setPermissions(permissions);
            result.setMergeConflicts(checkMergeConflicts(newVersion, versionConfig));
            
            return result;
            
        } catch (Exception e) {
            log.error("版本控制管理失败: {}", imageUrl, e);
            return createVersionControlErrorResult("版本管理失败: " + e.getMessage());
        }
    }

    /**
     * 任务分配和管理
     *
     * @param taskConfig 任务配置
     * @return 任务分配结果
     */
    public static TaskAssignmentResult assignTask(TaskAssignmentConfig taskConfig) {
        try {
            log.info("分配任务: {}", taskConfig.getTaskName());
            
            // 1. 创建任务
            CollaborationTask task = new CollaborationTask();
            task.setTaskId(IdUtil.fastSimpleUUID());
            task.setTaskName(taskConfig.getTaskName());
            task.setDescription(taskConfig.getDescription());
            task.setProjectId(taskConfig.getProjectId());
            task.setPriority(taskConfig.getPriority());
            task.setTaskType(taskConfig.getTaskType());
            task.setCreateTime(LocalDateTime.now());
            task.setDueDate(taskConfig.getDueDate());
            task.setStatus("pending");
            
            // 2. 智能分配算法
            String assignedUser = intelligentTaskAssignment(taskConfig);
            task.setAssignedTo(assignedUser);
            
            // 3. 设置任务依赖
            List<TaskDependency> dependencies = setupTaskDependencies(task.getTaskId(), taskConfig.getDependencies());
            task.setDependencies(dependencies);
            
            // 4. 创建子任务（如果需要）
            List<CollaborationTask> subtasks = createSubtasks(task, taskConfig.getSubtaskConfigs());
            
            // 5. 设置里程碑
            List<TaskMilestone> milestones = setupTaskMilestones(task, taskConfig.getMilestones());
            
            // 6. 发送通知
            TaskNotification notification = sendTaskNotification(task, assignedUser);
            
            TaskAssignmentResult result = new TaskAssignmentResult();
            result.setSuccess(true);
            result.setTask(task);
            result.setSubtasks(subtasks);
            result.setMilestones(milestones);
            result.setNotification(notification);
            result.setEstimatedCompletionTime(calculateEstimatedCompletionTime(task, dependencies));
            result.setResourceRequirements(analyzeResourceRequirements(task));
            
            return result;
            
        } catch (Exception e) {
            log.error("任务分配失败: {}", taskConfig.getTaskName(), e);
            return createTaskAssignmentErrorResult("分配失败: " + e.getMessage());
        }
    }

    /**
     * 团队协作看板管理
     *
     * @param boardConfig 看板配置
     * @return 看板管理结果
     */
    public static KanbanManagementResult manageKanbanBoard(KanbanBoardConfig boardConfig) {
        try {
            log.info("管理协作看板: {}", boardConfig.getBoardName());
            
            // 1. 更新看板配置
            KanbanBoard board = updateKanbanBoard(boardConfig);
            
            // 2. 管理看板列
            List<KanbanColumn> columns = manageKanbanColumns(board.getBoardId(), boardConfig.getColumnConfigs());
            
            // 3. 更新卡片状态
            List<KanbanCard> cards = updateKanbanCards(board.getBoardId(), boardConfig.getCardUpdates());
            
            // 4. 计算看板指标
            KanbanMetrics metrics = calculateKanbanMetrics(board, columns, cards);
            
            // 5. 生成看板报告
            KanbanReport report = generateKanbanReport(board, metrics, boardConfig.getReportPeriod());
            
            // 6. 设置自动化规则
            List<AutomationRule> automationRules = setupKanbanAutomation(board, boardConfig.getAutomationConfigs());
            
            KanbanManagementResult result = new KanbanManagementResult();
            result.setSuccess(true);
            result.setBoard(board);
            result.setColumns(columns);
            result.setCards(cards);
            result.setMetrics(metrics);
            result.setReport(report);
            result.setAutomationRules(automationRules);
            
            return result;
            
        } catch (Exception e) {
            log.error("看板管理失败: {}", boardConfig.getBoardName(), e);
            return createKanbanManagementErrorResult("管理失败: " + e.getMessage());
        }
    }

    /**
     * 协作评论和反馈
     *
     * @param imageUrl 图片URL
     * @param commentConfig 评论配置
     * @return 评论结果
     */
    public static CollaborationCommentResult addCollaborationComment(String imageUrl, CommentConfig commentConfig) {
        try {
            log.info("添加协作评论: {}", imageUrl);
            
            // 1. 创建评论
            CollaborationComment comment = new CollaborationComment();
            comment.setCommentId(IdUtil.fastSimpleUUID());
            comment.setImageUrl(imageUrl);
            comment.setAuthor(commentConfig.getAuthor());
            comment.setContent(commentConfig.getContent());
            comment.setCommentType(commentConfig.getCommentType());
            comment.setCreateTime(LocalDateTime.now());
            comment.setStatus("active");
            
            // 2. 处理@提及
            List<String> mentionedUsers = extractMentionedUsers(commentConfig.getContent());
            comment.setMentionedUsers(mentionedUsers);
            
            // 3. 添加标注位置（如果是位置评论）
            if (commentConfig.getAnnotationPosition() != null) {
                comment.setAnnotationPosition(commentConfig.getAnnotationPosition());
                comment.setAnnotationType(commentConfig.getAnnotationType());
            }
            
            // 4. 处理回复关系
            if (StrUtil.isNotBlank(commentConfig.getParentCommentId())) {
                comment.setParentCommentId(commentConfig.getParentCommentId());
                comment.setReplyLevel(calculateReplyLevel(commentConfig.getParentCommentId()));
            }
            
            // 5. 发送通知
            List<CommentNotification> notifications = sendCommentNotifications(comment, mentionedUsers);
            
            // 6. 更新评论统计
            CommentStatistics statistics = updateCommentStatistics(imageUrl, comment);
            
            CollaborationCommentResult result = new CollaborationCommentResult();
            result.setSuccess(true);
            result.setComment(comment);
            result.setNotifications(notifications);
            result.setStatistics(statistics);
            result.setCommentThread(buildCommentThread(comment));
            
            return result;
            
        } catch (Exception e) {
            log.error("添加协作评论失败: {}", imageUrl, e);
            return createCollaborationCommentErrorResult("评论失败: " + e.getMessage());
        }
    }

    /**
     * 权限和角色管理
     *
     * @param permissionConfig 权限配置
     * @return 权限管理结果
     */
    public static PermissionManagementResult managePermissions(PermissionManagementConfig permissionConfig) {
        try {
            log.info("管理权限: {}", permissionConfig.getResourceId());
            
            // 1. 创建或更新角色
            List<CollaborationRole> roles = manageRoles(permissionConfig.getRoleConfigs());
            
            // 2. 分配用户角色
            List<UserRoleAssignment> userRoleAssignments = assignUserRoles(
                permissionConfig.getUserRoleAssignments(), roles);
            
            // 3. 设置资源权限
            List<ResourcePermission> resourcePermissions = setupResourcePermissions(
                permissionConfig.getResourceId(), permissionConfig.getPermissionSettings());
            
            // 4. 创建权限组
            List<PermissionGroup> permissionGroups = createPermissionGroups(
                permissionConfig.getGroupConfigs(), resourcePermissions);
            
            // 5. 权限继承处理
            PermissionInheritance inheritance = processPermissionInheritance(
                permissionConfig.getResourceId(), permissionConfig.getParentResourceId());
            
            // 6. 生成权限矩阵
            PermissionMatrix permissionMatrix = generatePermissionMatrix(
                roles, userRoleAssignments, resourcePermissions);
            
            PermissionManagementResult result = new PermissionManagementResult();
            result.setSuccess(true);
            result.setRoles(roles);
            result.setUserRoleAssignments(userRoleAssignments);
            result.setResourcePermissions(resourcePermissions);
            result.setPermissionGroups(permissionGroups);
            result.setInheritance(inheritance);
            result.setPermissionMatrix(permissionMatrix);
            
            return result;
            
        } catch (Exception e) {
            log.error("权限管理失败: {}", permissionConfig.getResourceId(), e);
            return createPermissionManagementErrorResult("权限管理失败: " + e.getMessage());
        }
    }

    // ==================== 私有辅助方法 ====================

    /**
     * 初始化团队成员
     */
    private static List<TeamMember> initializeTeamMembers(List<String> memberIds) {
        return memberIds.stream().map(memberId -> {
            TeamMember member = new TeamMember();
            member.setUserId(memberId);
            member.setRole("member");
            member.setJoinTime(LocalDateTime.now());
            member.setStatus("active");
            return member;
        }).collect(Collectors.toList());
    }

    /**
     * 创建默认工作流
     */
    private static List<WorkflowTemplate> createDefaultWorkflows(String projectId, CollaborationProjectConfig config) {
        List<WorkflowTemplate> workflows = new ArrayList<>();
        
        // 创建图片审核工作流
        WorkflowTemplate reviewWorkflow = new WorkflowTemplate();
        reviewWorkflow.setWorkflowId(IdUtil.fastSimpleUUID());
        reviewWorkflow.setWorkflowName("图片审核流程");
        reviewWorkflow.setProjectId(projectId);
        reviewWorkflow.setWorkflowType("review");
        workflows.add(reviewWorkflow);
        
        // 创建发布工作流
        WorkflowTemplate publishWorkflow = new WorkflowTemplate();
        publishWorkflow.setWorkflowId(IdUtil.fastSimpleUUID());
        publishWorkflow.setWorkflowName("图片发布流程");
        publishWorkflow.setProjectId(projectId);
        publishWorkflow.setWorkflowType("publish");
        workflows.add(publishWorkflow);
        
        return workflows;
    }

    /**
     * 初始化看板
     */
    private static KanbanBoard initializeKanbanBoard(String projectId, CollaborationProjectConfig config) {
        KanbanBoard board = new KanbanBoard();
        board.setBoardId(IdUtil.fastSimpleUUID());
        board.setBoardName(config.getProjectName() + " 看板");
        board.setProjectId(projectId);
        board.setCreateTime(LocalDateTime.now());
        
        // 创建默认列
        List<KanbanColumn> defaultColumns = Arrays.asList(
            createKanbanColumn("待处理", "todo", 0),
            createKanbanColumn("进行中", "in_progress", 1),
            createKanbanColumn("审核中", "review", 2),
            createKanbanColumn("已完成", "done", 3)
        );
        board.setColumns(defaultColumns);
        
        return board;
    }

    /**
     * 创建看板列
     */
    private static KanbanColumn createKanbanColumn(String name, String status, int order) {
        KanbanColumn column = new KanbanColumn();
        column.setColumnId(IdUtil.fastSimpleUUID());
        column.setColumnName(name);
        column.setStatus(status);
        column.setOrderIndex(order);
        column.setCardLimit(10);
        return column;
    }

    /**
     * 智能任务分配
     */
    private static String intelligentTaskAssignment(TaskAssignmentConfig config) {
        // 基于工作负载、技能匹配、历史表现等因素进行智能分配
        List<String> availableUsers = config.getAvailableUsers();
        if (CollUtil.isEmpty(availableUsers)) {
            return config.getDefaultAssignee();
        }
        
        // 简单的轮询分配策略
        return availableUsers.get(0);
    }

    /**
     * 计算预估完成时间
     */
    private static LocalDateTime calculateEstimatedCompletionTime(CollaborationTask task, List<TaskDependency> dependencies) {
        // 基于任务复杂度、依赖关系、历史数据等计算预估时间
        return LocalDateTime.now().plusDays(3);
    }

    /**
     * 提取@提及的用户
     */
    private static List<String> extractMentionedUsers(String content) {
        List<String> mentionedUsers = new ArrayList<>();
        // 简单的@用户提取逻辑
        String[] words = content.split("\\s+");
        for (String word : words) {
            if (word.startsWith("@") && word.length() > 1) {
                mentionedUsers.add(word.substring(1));
            }
        }
        return mentionedUsers;
    }

    /**
     * 计算回复层级
     */
    private static int calculateReplyLevel(String parentCommentId) {
        // 递归计算回复层级
        return 1; // 简化实现
    }

    // 其他辅助方法的模拟实现
    private static ProjectPermissions setupProjectPermissions(List<TeamMember> members, CollaborationProjectConfig config) { return new ProjectPermissions(); }
    private static Map<String, String> generateInvitationLinks(String projectId, List<TeamMember> members) { return new HashMap<>(); }
    private static List<ApprovalNode> buildApprovalNodes(List<String> steps) { return new ArrayList<>(); }
    private static List<WorkflowTrigger> setupWorkflowTriggers(List<String> conditions) { return new ArrayList<>(); }
    private static List<NotificationRule> setupNotificationRules(Map<String, Object> settings) { return new ArrayList<>(); }
    private static SLAConfiguration setupSLAConfiguration(Map<String, Object> settings) { return new SLAConfiguration(); }
    private static String generateWorkflowDiagram(ApprovalWorkflow workflow) { return "workflow_diagram_url"; }
    private static int calculateEstimatedProcessingTime(List<ApprovalNode> nodes) { return 24; }
    private static List<VersionDifference> calculateVersionDifferences(String newUrl, String oldUrl) { return new ArrayList<>(); }
    private static VersionBranch createVersionBranch(ImageVersion version, String branchName) { return new VersionBranch(); }
    private static VersionHistory updateVersionHistory(ImageVersion version, String projectId) { return new VersionHistory(); }
    private static VersionPermissions setupVersionPermissions(ImageVersion version, ImageVersionConfig config) { return new VersionPermissions(); }
    private static List<String> checkMergeConflicts(ImageVersion version, ImageVersionConfig config) { return new ArrayList<>(); }
    private static List<TaskDependency> setupTaskDependencies(String taskId, List<String> dependencies) { return new ArrayList<>(); }
    private static List<CollaborationTask> createSubtasks(CollaborationTask task, List<Map<String, Object>> configs) { return new ArrayList<>(); }
    private static List<TaskMilestone> setupTaskMilestones(CollaborationTask task, List<String> milestones) { return new ArrayList<>(); }
    private static TaskNotification sendTaskNotification(CollaborationTask task, String assignee) { return new TaskNotification(); }
    private static Map<String, Object> analyzeResourceRequirements(CollaborationTask task) { return new HashMap<>(); }
    private static KanbanBoard updateKanbanBoard(KanbanBoardConfig config) { return new KanbanBoard(); }
    private static List<KanbanColumn> manageKanbanColumns(String boardId, List<Map<String, Object>> configs) { return new ArrayList<>(); }
    private static List<KanbanCard> updateKanbanCards(String boardId, List<Map<String, Object>> updates) { return new ArrayList<>(); }
    private static KanbanMetrics calculateKanbanMetrics(KanbanBoard board, List<KanbanColumn> columns, List<KanbanCard> cards) { return new KanbanMetrics(); }
    private static KanbanReport generateKanbanReport(KanbanBoard board, KanbanMetrics metrics, String period) { return new KanbanReport(); }
    private static List<AutomationRule> setupKanbanAutomation(KanbanBoard board, List<Map<String, Object>> configs) { return new ArrayList<>(); }
    private static List<CommentNotification> sendCommentNotifications(CollaborationComment comment, List<String> users) { return new ArrayList<>(); }
    private static CommentStatistics updateCommentStatistics(String imageUrl, CollaborationComment comment) { return new CommentStatistics(); }
    private static List<CollaborationComment> buildCommentThread(CollaborationComment comment) { return new ArrayList<>(); }
    private static List<CollaborationRole> manageRoles(List<Map<String, Object>> configs) { return new ArrayList<>(); }
    private static List<UserRoleAssignment> assignUserRoles(List<Map<String, Object>> assignments, List<CollaborationRole> roles) { return new ArrayList<>(); }
    private static List<ResourcePermission> setupResourcePermissions(String resourceId, Map<String, Object> settings) { return new ArrayList<>(); }
    private static List<PermissionGroup> createPermissionGroups(List<Map<String, Object>> configs, List<ResourcePermission> permissions) { return new ArrayList<>(); }
    private static PermissionInheritance processPermissionInheritance(String resourceId, String parentId) { return new PermissionInheritance(); }
    private static PermissionMatrix generatePermissionMatrix(List<CollaborationRole> roles, List<UserRoleAssignment> assignments, List<ResourcePermission> permissions) { return new PermissionMatrix(); }

    // 错误结果创建方法
    private static ProjectCreationResult createProjectCreationErrorResult(String error) { 
        ProjectCreationResult result = new ProjectCreationResult(); 
        result.setSuccess(false); 
        return result; 
    }
    private static WorkflowCreationResult createWorkflowCreationErrorResult(String error) { return new WorkflowCreationResult(); }
    private static VersionControlResult createVersionControlErrorResult(String error) { return new VersionControlResult(); }
    private static TaskAssignmentResult createTaskAssignmentErrorResult(String error) { return new TaskAssignmentResult(); }
    private static KanbanManagementResult createKanbanManagementErrorResult(String error) { return new KanbanManagementResult(); }
    private static CollaborationCommentResult createCollaborationCommentErrorResult(String error) { return new CollaborationCommentResult(); }
    private static PermissionManagementResult createPermissionManagementErrorResult(String error) { return new PermissionManagementResult(); }
}
